Likely, but self insurance is a thing for a reason, if it was cheaper to insure than self insured they'd probably do that, but they have that risk wether it was arson or an accident and if one warehouse would actually hurt them, they wouldn't be self insuring.

Any way you look at it, unless it hits them enough that they have to be concerned about the price of champagne they're filling their swimming pools with, 'one' incident isn't going to make them rethink their whole salary structure. At this rate it's shifting from one budget line item to another, and they'll probably just take it as an opportunity to invest in two warehouse to replace the one that went up.